Question

Define specific resistance and obtain si unit

Answer 1

Definition : The resistivity (or specific resistance) of a material is the resistance of a conductor (of the material) of unit length and unit area of cross section.

 

                    Numerically,the resistivity of a material is the resistance offered by a cube of the material with sides of unit length when a current flows through its opposite faces.

                    we have, ρ=RA/l

                    ∴ SI unit of ρ=ohm.metre 2/metre=ohm.metre

I hope help you.

Answer 2

specific resistance :

• The resistance of a material having unit length and unit cross - sectional area is known as its "specific resistance" or resistivity.

SI unit of resistivity is ohm-meter .

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@RAVALIKA RAJULA